Non-slip footwear having cushion separation part

ABSTRACT

The present invention relates to a non-slip footwear having a cushion separation part, in which a non-slip material is formed on an inner surface and an outer surface of a bottom of a footwear such as a sock, wherein the non-slip material of the inside and the outside are arranged alternately and a cushion separation part is formed therebetween such that maintenance of a non-slip function and prevention of skin injury are smoothly performed.

TECHNICAL FIELD

The present invention relates to a non-slip footwear having a cushionseparation part, in which a non-slip material is formed on an innersurface and an outer surface of a bottom of a footwear such as a sock,wherein the non-slip material of the inside and the outside are arrangedalternately and a cushion separation part is formed therebetween suchthat maintenance of a non-slip function and prevention of skin injuryare smoothly performed.

BACKGROUND ART

A foot is a body part for maintaining a balance of a human body andsupporting a body weight to absorb an impact and through which numerousblood vessels and nerves pass.

As a unit for protecting the foot, stockings, tights, outer socks, andsocks (hereinafter, referred to as a ‘footwear’) are used.

The footwear may have a basic protection function and an additionalfunction such as exercise performance improvement, injury prevention,and foot odor reduction through sweat absorption.

When the general footwears are used, slippage may be generated betweenan inner surface of the footwear and a sole or between an outer surfaceof the footwear and an inner surface of a shoe due to a low frictioncoefficient of fiber materials selected for the footwears.

For example, when a woman wearing the footwear such as stockings andouter socks moves while wearing high heels (shoes) in which a heel ishigh, a weight is biased to a front side, and a force is concentrated ona toe to generate pain and stiffness in an instep, an ankle, and even amuscle of a thigh, thereby generating pain and fatigue of the foot.

Also, slippage is generated between the stocking and the foot due to theweight and a forward force for each step when walking, and the slippagebetween the stocking and the foot applies an impact to the toe. Thisimpact is continuously generated during walking.

Also, in case that a rear foot is slipped, as the rear foot is deviatedto the outside further when wearing the high heels, the angle may beeasily bent, and walking may be unstable to cause an ankle spraininjury.

According to the report of Health Insurance Review and AssessmentService, there were 1.6 million ankle sprain patients in the year of2010, and the number of the ankle sprain patients was increased to 1.86million in the year of 2014.

Also, in terms of sports activity such as running and skating, when awearer changes a speed or a direction or suddenly starts or stops duringthe sports activity, a phenomenon in which a foot of the wearer isslipped in a sock is generated, and a phenomenon in which the sock isslipped in a shoe is generated.

This phenomenon is generated because a grip capacity is not sufficientbetween the foot and the sock and between the sock and the shoe.

As described above, shortage of the sufficient grip capacity causesinjuries on an ankle or a knee as a sportsman is slipped.

As an effort for preventing injuries caused by the above slippagephenomenon and improving an exercise performance, the applicant of thepresent invention applies for a patent and registers “Non slip socks forsports” (Korean Patent Registration No. 10-1686547, patent document 1)and “Non slip insole for sports” (Korean Patent Registration No.W-1638404, patent document 2).

The above patent documents 1 and 2 relate to a cross-sectional structureof a material for strengthening a non-slip function in a sock or aninsole and a manufacturing method.

However, when a non-slip material suggested in the patent document 1 isapplied to all of an inner surface and an outer surface of the sock tomaximize a friction force, a limitation of causing an injury on a footof a wearer is generated by applying an excessive non-slip function asillustrated in FIG. 11.

This phenomenon is generated such that when the foot of the wearer andthe non-slip material of the sock are not in close contact with eachother (when close contact between the sole and the inner non-slipmaterial of the sock and close contact between the inside of the hoseand the outer non-slip material of the sock at the same point areperformed), a force applied to a skin extremely increases because aweight of the wearer is transferred to the same point when the weight isapplied to the corresponding point.

Here, as a non-slip performance of the non-slip material increase, themore force is applied to the skin.

Particularly, since a side skin adjacent to the sole has a weak skin inthe foot of the wearer, an injury may be further easily generated.

In addition, the foot may feel foreign body sensation when wearing asock in which the non-slip material is formed by a method such ascoating to protrude at the same point of the outside and the inside ofthe sock, and the foreign body sensation is changed into pressingsensation as a continuous pressure is applied when wearing for a longtime. Here, this foreign body sensation and the pressing sensationfurther increases as a thickness of the sock decreases to cause sore andfever on the skin of the wearer, which contacts the non-slip material,and even a blister and an injury.

Although Japanese Utility Model Laid-Open No. 3161737 (patent document3) discloses a configuration in which projections of the inside and theoutside of a sock are alternately arranged to restrict the foreign bodysensation when wearing caused by installing the non-slip projections,the corresponding document discloses only the foreign body sensationwhen wearing, but does not disclose a measure for reducing the risk ofinjury of a wearer by arranging the non-slip material that maximizes afriction force as in the patent documents 1 and 2.

Also, the patent document 3 does not mention about absorption anddrainage of sweat generated in the sole of the sock wearer.

When a professional athlete exercises more than a certain level duringexercise, generated sweat exceeds a sweat absorption amount of a fibertissue of the footwear main body, and thus a contact portion between thesock and the sole of the user is wet by the sweat. This may degrade thenon-slip function and cause a slippage phenomenon caused by the sweat,thereby degrading the exercise performance.

As described above, the footwear capable of preventing skin injury ofthe user by arbitrary arranging the non-slip material having a highgripping performance on the footwear and preventing degradation of thenon-slip function generated in a drainage state of a large amount ofsweat like the patent document 1 registered by the applicant is requiredto be developed.

RELATED ART DOCUMENT

(Patent document 1) KR 10-1686547 (2016 Dec. 8)

(Patent document 2) KR 10-1638404 (2016 Jul. 5)

(Patent document 3) JP 3161737 (2010 Aug. 5)

DISCLOSURE OF THE INVENTION Technical Problem

The present invention provides a non-slip footwear having a cushionseparation part, which is capable of preventing skin injury byalternately arranging non-slip materials on an inner surface and anouter surface of a sock to prevent an excessive non-slip function thatexceeds a proper non-slip function, in order to resolve theabove-described limitation of the related art.

More particularly, the cushion separation part that is an area in whichthe non-slip material is not disposed as the non-slip materials formedon the inside and the outside of a bottom of a sock do not overlap eachother on a plane is formed, wherein the cushion separation part of aportion receiving a great load and having a rigid skin such as a toe, afore foot, a rear foot, and a foot blade has a narrow width, and thecushion separation part of another portion having a weak skin has a widewidth to prevent skin injury and maximize an exercise performance.

Specifically, a phenomenon in which the sock is deviated from a surfaceof an insole is restricted by restricting slippage in a state contactingthe insole of a shoe when wearing the shoe as the non-slip material isarranged on an outer surface of a circumference of the bottom of thesock.

In addition, the non-slip material includes a column cell having atumbling doll shape and a wet-type polyurethane sheet in which anon-slip groove communicating with the column cell is formed, and as thesheet is bonded to a footwear main body through a hot-melt adhesivelayer, the footwear main body forms a drainage and stay space of therest sweat remained after a large amount of sweat generated duringexercise is absorbed to prevent degradation of a non-slip functioncaused by the large amount of sweat and provide comfortable wearingsensation.

Furthermore, sweat introduced to the non-slip material of the innersurface through a punching hole perforated by a needle is smoothlypermeated into the non-slip material of the outer surface through thecushion separation part to further smoothly perform the above-describedfunction.

Technical Solution

In order to resolve the above problem, a non-slip footwear having acushion separation part of the present invention, in which an innersurface part 1 a contacting a foot of a wearer is formed on a topsurface of a bottom of a foot wear main body 1 for accommodating thefoot of the wearer and an outer surface part 1 b is formed on a bottomsurface of the bottom, the non-slip footwear includes: an outercircumferential non-slip part 10 made of a material preventing slippageand formed on a circumference of the outer surface part 1 b; a pluralityof outer horizontal non-slip parts 20 formed in left and rightdirections of a sole and a plurality of outer vertical non-slip parts 30formed in front and rear directions of the sole, which are made of thematerial preventing slippage in an inner space surrounded by the outercircumferential non-slip part 10; an outer slip part 40 surrounded bythe outer horizontal non-slip parts 20 and the outer vertical non-slipparts 30; and an inner non-slip part 60 made of the material preventingslippage and disposed in the outer slip part 40 on a plane while forminga cushion separation part 50 that is a space spaced apart from the outerhorizontal non-slip parts 20 and the outer vertical non-slip parts 30,which are adjacent to each other on the plane. Here, the inner non-slippart 60 includes a first inner non-slip part 61 formed in correspondenceto any one position of a toe, a fore foot, a rear foot, and a foot bladeof a user and a second inner non-slip part 62 formed on a portion exceptfro the first inner non-slip part 61, and the cushion separation part 50of the first inner non-slip part 61 is less in size than the cushionseparation part 50 of the second inner non-slip part 62.

In the above configuration, the cushion separation part 50 of the firstinner non-slip part 61 may have a size of 2 mm to 4 mm, and the cushionseparation part 50 of the second inner non-slip part 62 may have a sizeof 5 mm to W mm.

Also, each of the outer circumferential non-slip part 10, the outerhorizontal non-slip part 20, and the outer vertical non-slip part 30 maybe bonded to the footwear main body 1 through a hot-melt adhesive layer73, and each of the inner non-slip part 60, the outer circumferentialnon-slip part 10, the outer horizontal non-slip part 20, and the outervertical non-slip part 30 may be made of a wet-type polyurethane sheetin which a column cell having a reverse tumbling doll shape having awide top and a narrow bottom is formed therein, and a non-slip groove 72entirely or partially communicating with a column cell 71 is formed onan opposite surface of a portion contacting the hot-melt adhesive layer73.

Furthermore, the footwear main body 1 may be made of water permeablecloth in which moisture passes between the inner surface part 1 a andthe outer surface part 1 b.

In addition, a punching hole 80 may be formed in the footwear main body1 through needle punching treatment from a surface of the cushionseparation part 50 to the outer surface part 1 b, and as the punchingtreatment is performed in a state in which liquefied resin is applied ona surface of the needle, the liquefied resin applied on the needle maybe stained on a wall surface of the punching hole 80 and then cured toform a resin wall part 81.

Advantageous Effects

According to the present invention, the skin injury may be prevented bypreventing the excessive non-slip function that exceeds the propernon-slip function as the material preventing slippage is alternatelyarranged on the inner surface and the outer surface of the sock.

More particularly, the cushion separation part that is an area in whichthe non-slip material is not disposed as the non-slip materials formedon the inside and the outside of the bottom of the sock do not overlapeach other on the plane is formed, wherein the cushion separation partof the portion receiving a great load and having a rigid skin such as atoe, a fore foot, a rear foot, and a foot blade has a narrow width, andthe cushion separation part of another portion having a weak skin has awide width to prevent the skin injury and maximize the exerciseperformance.

Specifically, the phenomenon in which the sock is deviated from thesurface of the insole is restricted by restricting the slippage in thestate contacting the insole of the shoe when wearing the shoe as thenon-slip material is arranged on the outer surface of the circumferenceof the bottom of the sock.

In addition, the non-slip material includes the column cell having thetumbling doll shape and the wet-type polyurethane sheet in which thenon-slip groove communicating with the column cell is formed, and as thesheet is bonded to the footwear main body through the hot-melt adhesivelayer, the footwear main body forms the drainage and stay space of therest sweat remained after a large amount of sweat generated duringexercise is absorbed to prevent degradation of the non-slip functioncaused by the large amount of sweat and provide the comfortable wearingsensation.

Furthermore, the sweat introduced to the non-slip material of the innersurface through the punching hole perforated by the needle is smoothlypermeated into the non-slip material of the outer surface through thecushion separation part to further smoothly perform the above-describedfunction.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view illustrating an embodiment of a non-slipfootwear having a cushion separation part of the present invention.

FIG. 2 is a plan view illustrating an outer surface of the non-slipfootwear of the present invention.

FIG. 3 is a plan view illustrating an inner surface of the non-slipfootwear of the present invention.

FIG. 4 is a plan view illustrating an arrangement state of non-slipmaterials of the outer surface and the inner surface of FIGS. 2 and 3.

FIG. 5 is a side cross-sectional view of the non-slip footwear havingthe cushion separation part of the present invention.

FIG. 6 is a cross-sectional view illustrating a state before a userwears the non-slip footwear of the present invention.

FIG. 7 is a cross-sectional view illustrating a state after the userwears the non-slip footwear of the present invention.

FIG. 7 is an enlarged cross-sectional view illustrating a movement stateof sweat of a main portion of FIG. 7.

FIG. 9 is a cross-sectional flowchart illustrating a process of forminga punching hole through punching of a needle coated with resin in thepresent invention.

FIG. W is a cross-sectional view illustrating a movement state of sweataccording to formation of the punching hole of FIG. 9.

FIG. 11 is a photograph showing a state after a vertically overlappednon-slip sock is worn of the related art.

DETAILED DESCRIPTION ON REFERENCE NUMERALS OF DRAWING

-   -   1: Footwear main body    -   1 a: Inner surface part    -   1 b: Outer surface part    -   2: Foot    -   3: Shoe    -   4: Sweat    -   10: Outer circumferential non-slip part    -   20: Outer horizontal non-slip part    -   30: Outer vertical non-slip part    -   40: Outer slip part    -   50: Cushion separation part    -   51: Inner slip part    -   60: Inner non-slip part    -   61: First inner non-slip part    -   62: Second inner non-slip part    -   : Column cell    -   72: Non-slip groove    -   72 a: Auxiliary groove    -   73: Hot-melt adhesive layer    -   80: Punching hole    -   81: Resin wall part    -   90: Upper drainage space    -   91: Lower stay space    -   100: Needle    -   110: Resin supply pipe    -   120: Resin    -   a: Width

MODE FOR CARRYING OUT THE INVENTION

The present invention relates to a footwear in which an inner surfacepart 1 a contacting a foot of a wearer is formed on a top surface of abottom of a footwear main body 1 and an outer surface part 1 b is formedon a bottom surface of the bottom as illustrated in FIG. 1.

Hereinafter, a non-slip footwear of the present invention will bedescribed in detail with reference to the accompanying drawings.

In the present invention, the footwear main body 1 may be made ofvarious cloths, and more particularly, may be made of a water permeablecloth, which allows moisture to pass between the inner surface part 1 aand the outer surface part 1 b.

This may be sufficiently achieved by a typical method of securing aspace between neighboring wefts and neighboring warps in a weavingprocess of the wefts and warps using general threads, and typical socksmay be made to allow moisture to pass therethrough by using this weavingmethod.

As illustrated in FIG. 1, in the non-slip footwear having a separatecushion part of the present invention, an outer circumferential non-slippart 10, an outer horizontal non-slip part 20, and an outer verticalnon-slip part 30 are formed on the outer surface part 1 b.

Also, an inner non-slip part 60 is formed at the inner surface part 1 a.

More particularly, as illustrated in FIGS. 1 and 2, the outercircumferential non-slip part 10 is formed along a circumference of theouter surface part 1 b and is made of a material preventing slippage,i.e., a non-slip material, in a method such as coating or bonding.

As illustrated in FIGS. 1 and 2, a plurality of outer horizontalnon-slip parts 20 are formed in parallel in left and right directions ofa sole of an inner space on the outer surface part 1 b surrounded by theouter circumferential non-slip part 10.

Here, although the outer horizontal non-slip part 20 is linearlyillustrated in the drawing, the embodiment of the present invention isnot limited thereto. For example, the outer horizontal non-slip part 20may be formed by a combination of various straight lines and curvedlines such as a bent shape or a curved shape having a predeterminedpitch as long as the plurality of outer horizontal non-slip parts 20 arearranged in parallel to each other.

As illustrated in FIGS. 1 and 2, a plurality of outer vertical non-slipparts 30 are formed in parallel in front and rear directions of the soleof the inner space on the outer surface part 1 b surrounded by the outercircumferential non-slip part 10.

Thus, the outer vertical non-slip parts 30 cross the outer horizontalnon-slip parts 20, and this crossing configuration forms a zone in theouter surface part 1 b, in which the non-slip parts 10, 20, and 30 arenot formed, i.e., the outer slip part 40 in which only the footwear mainbody 1 is exposed to the outside.

Here, the embodiment of the present invention is not limited to thestraight line shape of the outer vertical non-slip part 30 like theouter horizontal non-slip part 20. The outer vertical non-slip part 30may have a combined shape of a curved line and a straight line or acurved line shape.

The outer horizontal non-slip part 20 and the outer vertical non-slippart 30 may be made of the material preventing slippage, i.e., thenon-slip material, like the outer circumferential non-slip part 10 andfixed to the footwear main body 1 by the same method such as bonding andcoating.

Also, as illustrated in FIGS. 1 and 3, the inner non-slip part 60 isformed at the inner surface part 1 a of the footwear main body 1.

The inner non-slip parts 60 are independent from each other and arrangedin a braille character type.

Here, a portion in the inner surface part 1 a except for an area onwhich the inner non-slip parts 60 is disposed is referred to as an innerslip part 51.

Here, as illustrated in FIG. 4, each of the inner non-slip parts 60 isdisposed in each of the outer slip parts 40 on a plane.

Particularly, each of the inner non-slip parts 60 has a size less thanthat of the outer slip part 40, and an outer portion thereof is spacedapart from the outer horizontal non-slip part 20, the outer verticalnon-slip part 30, and the outer circumferential non-slip part 10, whichare disposed at a circumference of the outer slip part 40.

In the present invention, this spaced portion is referred to as acushion separation part 50.

The cushion separation part 50 corresponds to a lower area notoverlapping the outer circumferential non-slip part 10, the outerhorizontal non-slip part 20, and the outer vertical non-slip part 30 onthe inner slip part 51.

That is, as illustrated in FIG. 4, the inner non-slip parts 60 isdisposed inside the outer slip part 40 while forming the cushionseparation part 50 that is a space spaced apart from the outerhorizontal non-slip part 20 and the outer vertical non-slip part 30,which are adjacent thereto on the plane.

In addition, the inner non-slip parts 60 are also made of the materialpreventing slippage, i.e., the non-slip material, like theabove-described non-slip parts 10, 20, and 30 and fixed to the footwearmain body 1 by the same method such as bonding and coating.

Furthermore, the inner non-slip parts 60 include a first inner non-slippart 61 and a second inner non-slip part 62 according to positions onthe inner surface part 1 a.

The first inner non-slip part 61 is formed in correspondence to aposition of a toe, a fore foot, a rear foot, and a foot blade of a user,and the second inner non-slip part 62 is formed on a portion except forthe first inner non-slip part 61.

Also, the first inner non-slip part 61 is greater in size than thesecond inner non-slip part 62.

Thus, the cushion separation part 50 around the first inner non-slippart 61 is less in size than the cushion separation part 50 around thesecond inner non-slip part 62.

Specifically, the cushion separation part 50 around the first innernon-slip part 61 may have a width of 2 mm to 4 mm, and the cushionseparation part 50 around the second inner non-slip part 62 may have awidth of 5 mm to W mm.

Here, a width a of the cushion separation part 50 represent a distancebetween an end of the outer slip part 40 to an end of the inner non-slipparts 60, which are positioned at the same position on the plane.

The reason why the width of the cushion separation part 50 is variedaccording to a portion of the foot is because rigidity of a surface ofthe foot is varied according to portions, and a force applied to thesurface of the foot is varied according to the portions.

That is, since a lower portion of the toe, the fore foot, the rear foot,and the foot blade, on which a friction force and a load areconcentrated during movement, have a rigid flesh and an extremely quickexercise ability, the cushion separation part 50 may have a relativelysmall width, i.e., the first inner non-slip part 61 may have a greatsize, to focus on maximization of the exercise ability, and on thecontrary, in a weak portion except for the above portions, the widththereof may increase to minimize generation of an injury.

Here, the above numerical limitation represents that whether the innernon-slip part 60 and the outer horizontal non-slip part 20, which areadjacent each other, are mutually interfered on a cross-section likeFIG. 5 is determined through a plurality of experiments in considerationof elasticity of a sock, flatness of a sole, and deformation of the soleinside a shoe during exercise, and is obtained according to a preferenceresearch on feelings of wearing and after exercising of W soccerplayers.

As a result, an experiment, which is performed by using football socksdistributed in the market as a main body in a condition in which thewidth of the cushion separation part 50 is basically greater than 10 mmregardless of portions, exhibits a result of not generating a meaningfulincreasing feeling in a satisfaction feeling of an exercise performancealthough skin injury of a wearer is not reported.

On the contrary, when the width of the cushion separation part 50 isless than 5 mm, the experiment exhibits a result in which the weakportions except for the sole, the fore foot, the rear foot, and the footblade are rubbed and sore although no skin injury is reported in thesole, the fore foot, the rear foot, and the foot blade.

Also, when the width of the cushion separation part 50 is less than 2mm, the experiment exhibits a result in which even the sole, the forefoot, the rear foot, and the foot blade are rubbed and sore.

On the basis of the above results, it may be known that when the cushionseparation part 50 of the first inner non-slip part 61 has a width of 2mm to 4 mm, and the cushion separation part 50 of the second innernon-slip part 62 has a width of 5 mm to 10 mm, the skin injury may beprevented, and optimized exercise performance may be exhibited.

Although the outer circumferential non-slip part 10, the outerhorizontal non-slip part 20, and the outer vertical non-slip part 30 inthe above configuration may be made of well-known various non-slipmaterials, a non-slip material having a structure in which numerouspores are formed between a frame so that moisture is movabletherethrough is appropriate.

To this end, an optimum material may be a wet-type polyurethane sheet.

Specifically, the wet-type polyurethane sheet is manufactured by usingone of a fabric or a polyester film as a carrier, and then the carrieris removed so that a surface from which the carrier is removed becomes agripping surface; a non-woven cloth is impregnated and applied to apolyurethane resin, then solidification and de-DMF treatment isperformed, and then a surface skin of the manufactured sheet is removedso that a surface from which the surface skin is removed becomes agripping surface; or a wet-type polyurethane sheet is manufactured byusing one of a fabric or a polyester film as a carrier, and then asurface film at an opposite surface of the carrier is removed by asandpaper so that the surface from which the surface film is removedbecomes a gripping surface.

The polyurethane sheet manufactured by the above method has a structure,in which numerous pores are formed therein, external moisture isintroducible to a space around the frame, and all or a portion of theintroduced moisture is dischargeable to a bottom surface or a wallsurface, and form a gripping surface by forming a micro-uneven surfacethrough the above method such as carrier removal, surface skin removal,or sandpaper removal.

The wet-type polyurethane sheet in FIGS. 5 and 6 has a structure inwhich a column cell 71 having a reverse tumbling doll shape having awide top and a narrow bottom is formed therein, and a non-slip groove 72entirely or partially communicating with the column cell 71 is formed onan opposite surface of a portion contacting the footwear main body 1.

The method for forming the above structure may be specifically achievedsuch that poly-urethane is melted in dimethylformamide and applied onthe carrier by comma coating or knife coating, then coagulated by beinginputted into a coagulation bath in which a mixed solution of water anddimethylformamide is accommodated, and then a urethane sheet ismanufactured by removing the dimethylformamide and removing and dryingresidual dimethylformamide by hot air, and then the carrier is removedso that a surface from which the carrier is removed becomes the non-slipgroove 72.

The above manufacturing method forms a structure in which the tumblingdoll shaped column cell 71 is formed in the coagulation process, and thenon-slip groove 72 is formed in a process of removing the carrier suchas a fabric or a polyester film, and more particularly, a structure inwhich the surface from which the carrier is removed becomes the non-slipsurface, i.e., the gripping surface, to smoothly perform sweatabsorption.

Here, since formation of the non-slip groove 72 is unclear according toa material of the carrier, an auxiliary groove of the reference numeral72 a may be additionally formed through a separate surface treatmentsuch as sandpaper treatment.

Bonding of the non-slip material that is described above as an exampleof the wet-type polyurethane sheet may be bonded through a hot-meltadhesive.

FIGS. 5 to 8 illustrate an example in which a hot-melt adhesive layer 73formed by applying a hot-melt adhesive is formed between the innernon-slip part 60 and the footwear main body 1 and between the outerhorizontal non-slip part 20 and the footwear main body 1.

Also, the hot-melt adhesive layer 73 is also formed between the outervertical non-slip part 30 and the footwear main body 1 and between theouter circumferential non-slip part 10 and the footwear main body 1 inthe same manner.

Typically, the hot-melt adhesive is made of a material having a perfectwaterproof performance or high waterproof performance such aspolyethylene, polyisobutylene, polyamide, or glue.

Also, a total area of the inner non-slip part 60 may be greater than atotal sum of areas of the outer circumferential non-slip part 10, theouter horizontal non-slip part 20, and the outer vertical non-slip part30.

This is because a non-slip function is strengthened as a total area ofthe portion firstly contacting the sole of the user increases.

However, since the area may not excessively increase, a proper ratiobetween a total area of the inner non-slip part 60 and the total sum ofthe areas of the outer circumferential non-slip part 10, the outerhorizontal non-slip part 20, and the outer vertical non-slip part 30 maybe 1:2 to 3.

An action of the non-slip footwear of the present invention, which isconfigured as described above, will be described as follows.

FIG. 6 is a conceptual cross-sectional view illustrating a state inwhich a wearer does not wear the non-slip footwear of the presentinvention, and FIG. 7 is a conceptual cross-sectional view illustratinga state after wearing.

As illustrated in the drawings, the inner non-slip part 60 and the outerhorizontal non-slip part 20 are alternately arranged from each otherwhen viewed on a side cross-section to form the cushion separation part50 that is an empty space therebetween.

Although not shown, the inner non-slip part 60 and the outer verticalnon-slip part 30 may have the same arrangement state.

The sole of the user presses the inner surface part 1 a in a state ofFIG. 6, and this state becomes a state of FIG. 7 when a friction forcecaused by exercise acts. Here, a directly lower portion of theindividual inner non-slip part 60 is a portion in which the outerhorizontal non-slip part 20 is not disposed, i.e., the outer slip part40 that is a lower surface of the footwear main body 1.

Since the lower portion of the inner non-slip part 60 is simply afibrous tissue of the footwear main body 1 instead of being made of thesame material, a compressive load and a friction force applied to theinner non-slip part 60 serves as slip having a relatively much lessnon-slip function to reduce friction.

This is obtained such that the friction is primarily reduced by theinner non-slip part 60, the friction force and the load are secondarilydistributed while passing the cushion separation part that is analternate point therearound, and the adjacent outer horizontal non-slippart 20 transmits the friction force and the load to the lower portionof the shoes, instead of using a method of reducing frictionconcentrically at one point, so as to prevent skin injury or the likecaused by concentrically applying the non-slip function to the foot ofthe wearer and enhancing the exercise performance.

When the cushion separation part 50 is not existed, i.e., when the innernon-slip part 60 and the outer horizontal non-slip part 20 arealternately arranged, the inner non-slip part 60 and the outerhorizontal non-slip part 20 may be arranged equally at a specific onepoint on a vertical line occasionally according to movement such as ownelasticity of the footwear main body 1, and the load and the frictionforce are directly transmitted to this point to cause skin injury of theuser.

The cushion separation part 50 serves to absorb moisture, activatedrainage, and form a temporary storage space as well as restrict theload and the friction force from being simply transmitted in a directdownward direction.

FIG. 8 illustrates an absorption and drainage state of sweat 4 accordingto the present invention.

Firstly, the inner non-slip part 60 absorbs sweat drained from a foot 2of the wearer because the column cell 11 and the non-slip groove 12 areformed.

Here, since the hot-melt adhesive 73 is typically made of a materialthat is almost waterproof, sweat absorption is delayed in the hot-meltadhesive 13, and sweat moves through a sidewall surface of the innernon-slip part 60 when the sweat is continuously generated.

This portion consists of the cushion separation part 50 spaced betweenthe inner non-slip part 60 and the outer horizontal non-slip part 20,and an upper drainage space 90 that is an empty space between the foot 2of the user and the footwear main body 1 generated by cross-sectionvariation of a wave shape of the footwear main body 1 is formed in thisportion as illustrated in the drawing, so that a small amount of sweattemporarily stay therein.

In addition, when the footwear main body 1 is made of a cloth that is awater permeable material having a sweat absorption and drainage functionlike a typical sport socks as described above, this sweat is absorbed tothe footwear main body 1.

When sweat is continuously generated in this state, the sweat (moisture)is heading to a bottom surface of the shoe 3. Here, sweat absorption isblocked by the hot-melt adhesive layer 73 in an area in which the outerhorizontal non-slip part 20 is bonded to the outer surface part 1 b ofthe footwear main body 1, the sweat moves through the cushion separationpart 50 outside the hot-melt adhesive layer 73, and then moisture istemporarily stored in a lower stay space 71 that is an empty spacearound the sidewall surface of the outer horizontal non-slip part 20.

This is generated such that the lower portion of the footwear main body1 is supported by the shoe 3 or a surface of an insole, and the lowerstay space 71 that is an empty space is formed in a side surface of thesidewall surface of the outer horizontal non-slip part 20 as the innernon-slip part 60 and the outer horizontal non-slip part 2 arealternately arranged and the footwear main body 1 is deformed into thewave shape as illustrated.

In this state, moisture stored in the lower stay space 71 is absorbed tothe sidewall surface of the outer horizontal non-slip part 20 or thecolumn cell 21 inside the outer horizontal non-slip part 20 through agap between the bottom surface of the shoe 2 and an end of the outerhorizontal non-slip part 20.

This configuration allows the inner non-slip part 60 and the outernon-slip parts 10, 20, and 30 to sufficiently keep sweat and smoothlydrain the sweat of the footwear main body 1 and performs temporarystoring of moisture through forming a temporary stay space of themoisture as the empty space is formed according to the wave shapedeformation of the footwear main body 1 caused by load pressing.

Here, moisture absorption in the footwear main body 1 may be maximallydelayed by smoothly moving the moisture from the upper drainage space 90to the lower stay space 91 through the cushion separation part 50.

This moisture absorption delay of the footwear main body 1 may increasea wearing feeling to the user and maximally delay a wet state of theupper surface of the inner non-slip part 20 and a surface of the innerslip part 51 that is the rest area to maximally restrict water membraneformation on the surface of the inner non-slip part 20, therebymaximally maintaining the non-slip function.

A detailed method for this is illustrated in FIG. 9.

Referring to FIG. 9, a needle 100 is disposed on the footwear main body1, and a resin supply pipe 110 is installed at upper one side of theneedle 100.

Here, liquefied resin 120 is supplied from an external storage tank tothe resin supply pipe 110.

Although the liquefied resin may include well-known resin such assilicon resin and polyurethane, fast-setting resin may be preferred.

Here, the needle 100 is disposed above the cushion separation part 50,and as a moving device such as an external press is connected to theneedle 100, the needle 100 moves downward and pass through the footwearmain body 1 by operation of the press.

Resin supply through the resin supply pipe U0 is performed before orduring the needle 100 moves downward, and in this process, the liquefiedresin 120 surrounds a surface of the needle 100.

When the needle 100 passes downward through the footwear main body 1, apunching hole 80 is formed according to the passing therethrough, and aresin wall part 81 is formed around the punching hole 80 as the resin120 is cured.

When the needle 100 is returned after the resin 120 is cured, the holeformed according to the fiber tissue constituting the footwear main body1 is maintained in an expanded state by the resin wall part 81.

Here, although only punching is performed in the resin 120 through theneedle 100 while the needle 100 is not coated, since the typical fibertissue constituting the footwear main body 1 has elasticity and iseasily returned to an original state after punched in a several tensileprocesses, a feature of forming the resin wall part 81 as describedabove is preferred.

When the punching hole 80 formed around the resin wall part 81 isformed, as a flow path passing through the footwear main body 1 isformed on the cushion separation part 50, the moisture may be furtherquickly collected in the lower stay space 91 to provide a comfortablewearing feeling to the wearer.

INDUSTRIAL APPLICABILITY

The non-slip footwear of the present invention may be applied to variousclothes surrounding and protecting the foot of the wearer such as allsorts of sports, climbing socks, tights, outer socks, and ordinarysocks.

1. A non-slip footwear having a cushion separation part, in which aninner surface part (1 a) contacting a foot of a wearer is formed on atop surface of a bottom of a foot wear main body (1) for accommodatingthe foot of the wearer and an outer surface part 1 b is formed on abottom surface of the bottom, the non-slip footwear comprising: an outercircumferential non-slip part (10) made of a material preventingslippage and formed on a circumference of the outer surface part (1 b);a plurality of outer horizontal non-slip parts (20) formed in left andright directions of a sole and a plurality of outer vertical non-slipparts (30) formed in front and rear directions of the sole, which aremade of the material preventing slippage in an inner space surrounded bythe outer circumferential non-slip part (10); an outer slip part (40)surrounded by the outer horizontal non-slip parts (20) and the outervertical non-slip parts (30); and an inner non-slip part (60) made ofthe material preventing slippage and disposed in the outer slip part(40) on a plane while forming a cushion separation part (50) that is aspace spaced apart from the outer horizontal non-slip parts (20) and theouter vertical non-slip parts (30), which are adjacent to each other onthe plane, wherein the inner non-slip part (60) comprises a first innernon-slip part (61) formed in correspondence to any one position of atoe, a fore foot, a rear foot, and a foot blade of a user and a secondinner non-slip part (62) formed on a portion except fro the first innernon-slip part (61), and the cushion separation part (50) of the firstinner non-slip part (61) is less in size than the cushion separationpart (50) of the second inner non-slip part (62).
 2. The non-slipfootwear of claim 1, wherein the cushion separation part (50) of thefirst inner non-slip part (61) has a size of 2 mm to 4 mm, and thecushion separation part (50) of the second inner non-slip part (62) hasa size of 5 mm to W mm.
 3. The non-slip footwear of claim 1, whereineach of the outer circumferential non-slip part (10), the outerhorizontal non-slip part (20), and the outer vertical non-slip part (30)is bonded to the footwear main body (1) through a hot-melt adhesivelayer (73), and each of the inner non-slip part (60), the outercircumferential non-slip part (10), the outer horizontal non-slip part(20), and the outer vertical non-slip part (30) is made of a wet-typepolyurethane sheet in which a column cell having a reverse tumbling dollshape having a wide top and a narrow bottom is formed therein, and anon-slip groove (72) entirely or partially communicating with a columncell (71) is formed on an opposite surface of a portion contacting thehot-melt adhesive layer (73).
 4. The non-slip footwear of claim 3,wherein the footwear main body (1) is made of water permeable cloth inwhich moisture passes between the inner surface part (1 a) and the outersurface part (1 b).
 5. The non-slip footwear of claim 4, wherein apunching hole (80) is formed in the footwear main body (1) throughneedle punching treatment from a surface of the cushion separation part(50) to the outer surface part (1 b), and as the punching treatment isperformed in a state in which liquefied resin is applied on a surface ofthe needle, the liquefied resin applied on the needle is stained on awall surface of the punching hole (80) and then cured to form a resinwall part (81).